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  #1  
Old 01-21-2020, 12:06 AM
mmakabeh mmakabeh is offline
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Catalytic Converter Failure

I am getting fail codes on Catalytic converter.. also on BanK 2 up and down on the O2.
Do you think it is the Cat or the O2 sensors?
or something else. ?
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  #2  
Old 01-21-2020, 02:30 AM
BabyUnicornTaco BabyUnicornTaco is offline
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Mein Auto: 2008 X5 4.8i E70 Sport
Quote:
Originally Posted by mmakabeh View Post
I am getting fail codes on Catalytic converter.. also on BanK 2 up and down on the O2.

Do you think it is the Cat or the O2 sensors?

or something else. ?

Itís typically the O2 sensors that go bad long before the cats but do you have a vacuum leak somewhere and the O2 sensors are working as they should? The O2 sensors are going to let you know your air/fuel ratio is off.


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Old 01-21-2020, 05:53 PM
HerbP HerbP is offline
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Quote:
Originally Posted by mmakabeh View Post
I am getting fail codes on Catalytic converter.. also on BanK 2 up and down on the O2.
Do you think it is the Cat or the O2 sensors?
or something else. ?
Have you done any work on the engine lately?
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  #4  
Old 02-10-2020, 07:02 AM
cjwcamaro19 cjwcamaro19 is offline
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Quote:
Originally Posted by mmakabeh View Post
I am getting fail codes on Catalytic converter.. also on BanK 2 up and down on the O2.
Do you think it is the Cat or the O2 sensors?
or something else. ?

Same thing happened to my 04. It was the left Cat. It was done for had to replace it. Cost about $800 dollars for the part. Luckily, but unluckily I was having the valve stem seals and cover work done so the engine was already out so I didn't get charged the labor for the Cat.
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cat, catalytic converter, o2, oxygen, sensor


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